Lock slider for slide fasteners



July 3, 1956 A. E. CARLILE LOCK SLIDER FOR SLIDE FASTENERS 2 Sheets-Sheet 1 Filed June 26, 1952 E 0 2 7 Z J /o R. .I/J

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1 MK. 1 A Y m B 7 6M w 7 M8 M 0/ f 3 w m w M I 0 Z n L M MM 01 V I M M 3 WW 5 Z T 6 July 3, 1956 A. E. CARLILE LOCK SLIDER FOR sum: FASTENERS Filed June 26, 1952 2 Sheets-Sheet 2 INVENTOR. ALFRED E. CARL/LE 5W ATTORNEY 2,752,655 LOCK SLIDER FDR SLIDE FASTENERS Alfred E. Carlile, Meadville, Pa., assignor to Talon,

a corporation of Pennsylvania Inc.,

This invention relates to slide fasteners of the type having a plurality of spaced-apart interlocking fastener elements attached to the adjacent edges of a pair of stringer tapes which are engaged and disengaged by movement of a slider therealong, and more particularly to an improved lock slider for preventing unintentional movement of the slider along the stringers.

Heretofore, various types of lock sliders have been proposed for locking the outer ends of the fastener elements in recesses or notches disposed in the flanges of the slider. Such sliders are known to those skilled in the art as "11otch lock sliders and are generally of the type shown in the patent to Nortion No. l,853,634, dated April 12, 1932. In such sliders, locking is usually dependent solely upon opposed lateral stress being exerted on the stringers which was unsatisfactory for the reason that if no lateral stresses were exerted, the slider would not lock and tend to creep along in an open direction thereby defeating the purpose for which it was intended. it is to such a notch lock type slider that the present invention relates.

in accordance with the present invention, there is provided a positive means for forcing the fastener elements outwardly toward the flanges of the slider and into the recesses or notches therein thereby overcoming the disadvantages of such notch sliders as have been heretofore suggested and used.

Accordingly, it is the general object of the present invention to provide an improved lock slider of the so-called notch lock type which is positive in its action and effectively locks the slider against unintentional movement along the fastener stringers.

it is another object of this invention to provide improved sli er which is simple and inexpensive in its construction, and, at the same time, one which is convenient to use and manipulate.

It is a further object of the invention to provide an improved slider which is automatically locked when no force is exerted on the pull member tending to open or close the fastener, and automatically unlocked when a pulling force is exerted on the pull member in either the opening or closing direction.

It is a more specific object of the present invention to provide an improved lock slider of the notch lock type having means arranged therewith which is controlled by the pull member for forcing the fastener elements outwardly into the recesses or notches in the flange of the slider.

Various other objects and advantages of this invention will be more apparent in the course of the following specification, and will be particularly pointed out in the appended claims.

in the accompanying drawings, there is shown for the purpose of illustration, an embodiment and a modification thereof which my invention may assume in practice.

in these drawings:

Fig. l is a fragmentary plan view of a slide fastener Patented July 3, 1955 having a slider of the preferred embodiment of my invention incorporated therewith;

Fig. 2 is a side view of my improved slider showing it in an unlocked position;

Fig. 3 is a vertical sectional view of the same showing it in a locked position;

Fig. 4 is a sectional view taken on line 4-4 of Fig. 2;

Fig. 5 is an enlarged sectional view taken on line 55 of Fig. 1, showing the slider in an unlocked position;

Fig. 6 is a sectional View, similar to Fig. 5, showing the slider in its locked position;

Fig. 7 is a plan view of a slider of a modified construction in accordance with my invention;

Fig. 8 is a side view, partly in section, of the modification shown in Fig. 7;

Fig. 9 is a sectional view taken on line 9-9 of Fig. 8, showing the slider unlocked; and

Fig. 10 is a sectional view, similar to Fig. 9, showing the slider in its locked position.

There is shown in Fig. l of the drawings, a conventional type slide fastener comprising a series of spacedapart interlocking fastener elements 2 attached to opposed beaded edges of tapes or stringers 3. There is arranged on the fastener elements, the improved slider 4 of my invention for longitudinal movement therealong in opposite directions to open and close the fastener in a well-known manner. Such a slider consists generally of overlying spaced-apart upper and lower wings 5 and 6, respectively, having inwardly extending guide flange portions 7 along their marginal edges and connected at one end thereof by a neck S so as to provide a Y-shaped channel between the wings into and through which the fastener elements pass when the slider is moved therealong for engaging and disengaging the same.

According to the preferred form of my invention, as shown in Figs. 1 through 6 of the drawings, immediately below the neck 5 of the slider, there is arranged in aligned apertures 9 in the upper and bottom wings, a movable post-like member 10 which extends through the channel of the slider. This post-like member preferably has an enlarged head portion 12 extending through the upper wing 5 and a reduced lower portion 13 extending through the lower wing 6. Between the enlarged head portion 12 and the reduced lower portion 13, the post-like member 10 is beveled so as to provide a cam surface 14 for a purpose hereinafter to be described.

On the lower end of the reduced lower portion 13 of the post-like member it), there is arranged an enlarged portion 15 so as to provide a shoulder 16. In a recess 17 in the bottom surface of the lower win' 6, there is housed preferably a coil spring 18 which is disposed around the reduced lower portion 13 of the post-like member ltl. This spring is confined by the shoulder 16 and the inner wall of the recess 17 of the lower wing.

There is pivotally connected to the enlarged head portion 12 of the post-like member 10 on the outer side of the upper wing 5 by means of trunnion portions 19, a pull member Zll for manipulating the slider in a wellknown manner. This pull member not only serves to actuate the slider for opening and closing the fastener but also serves to actuate the post-like member 10. On the outer end of the trunnion portion 19 of the pull member, there is arranged preferably cam portions 21 for a purpose presently to be described.

This embodiment of my invention functions in the following manner. When the pull member 20 is disposed fiat against the outer side of the upper wing 5 and in its inoperative position, as shown in Figs. 3 and 6, it will be understood that the post-like member 10 is urged inwardly due to the action of the spring 18. In such position, it will be seen that the cam surface 14 abuts the inner ends of the fastener elements 2 disposed directly opposite thereto in the channel of the slider thereby forcing the fastener elements outwardly toward the flanges 7 of the slider and into recesses or notches 22 formed on the inner walls thereof, as more clearly shown in Figs. 4 and 6, thereby locking the slider against movement.

When it is desired to move the slider along the stringers either in an opening or closing direction, the pull member 20 is grasped and moved to substantially a position normal to the upper wing of the slider, as shown in Figs. 1, 2, and 5. In such position, it will be seen that cam portion 21 of the pull member engages the outer surface of the upper wing 5 thereby moving the postlike member upwardly through the wings against the action of the spring 18. By such movement of the postlike, member, it will be seen that the cam surface 14 thereof moves up into the upper wing 5 and out of engagement with the fastener elements, as shown in Fig. 5. In such position, it will be seen that the outer ends of the fastener elements 2 are permitted to move out of the notches or recesses 22 so as to permit the fastener elements to pass freely through the channel of the slider. When it is again desired to again lock the slider, the pull member 10 is released and moved to position against the upper wing with the post-like member being urged to its retracted position in the slider due to the action of the spring 18 thereby locking the slider as previously explained, and as shown in Figs. 4 and 6 of the drawings. In Figs. 7 through 10, there is shown a modification of the slider of my invention. In this construction, there is provided a post-like member 23 which is mounted in aligned apertures in the wings 5 and 6 for rotative movement relative thereto. This post-like member is arranged centrally of the slider and also immediately below the neck 8 of the slider body and extends through the channel thereof at the point of divergence of the channel.

On the outer end of the post-like member 23, there is provided an enlarged head portion 24 to which there is pivotally attached a pull member 25 by means of trunnion portions 26. On the inner side of this head portion 24, there is provided preferably a key-like portion 27 which cooperates with an elongated slot 28 arranged in the outer surface of the upper wing 5. On the inner or opposite end of the post-like member 23, there is provided an enlarged portion 29 and a spring or biasing member 30 which is disposed between the head portion 29 and the outer surface of the lower wing 6.

Between the wings 5 and 6, the opposed walls of this slider positively in position along the stringers and prevents unintentional movement thereof.

While I have shown and described an embodiment and a modification thereof which my invention may assume in practice, it will be understood that the embodiment and modification are merely for the purpose of illustra tion and description, and that other forms may be devised within the scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. In a slider for slide fasteners of the type having a series of spaced-apart interlocking fastener elements arranged along the opposed longitudinally extending edges of a pair of stringer tapes, a pair of spaced-apart wing portions connected at one end thereof by a neck portion and having inwardly extending marginal flange portions so as to provide substantially a Y-shaped channel between said wings into and through which the fastener elements pass, means for locking said slider against unintentional movement along said elements comprising a cylindrical post-like member arranged in oppositely disposed aperture in said wings adjacent said neck portion and extending into and through said channel, said post-like member being mounted for reciprocable movement in a plane substantially normal to said wings, an annular cam portion carried by said post-like member intermediate its length disposed in said channel, at least one of said flanges having a recess arranged therein on the inner side thereof opposite said post-like member, said cam portion in one position adapted to engage the inner ends of said fastener elements so as to force the post-like member 23 are cut away or relieved, as at 31,

so as to form contracted walls on one side of this portion of the member and provide substantially a triangularshaped cross section 32 which acts as a cam for a purpose hereinafter to be described. Thus, it will be seen that when these contracted walls of the post member are disposed in one position, as shown in Fig. 9, they permit free passage of the fastener elements into and through the channel of the slider. When this post member 23 is rotated by means of the pull member 25 in either direction into a position at 180 degrees to that shown in Fig. '9, the unrelieved portion, namely, the outer surface of the triangular section 32 of the post-like member, will be moved into engagement with the outer ends of the fastener elements 2 disposed directly opposite thereto thereby forcing them outwardly so that the outer ends of the fastener elements are disposed in the notches or recesses 33 arranged on the inner surfaces of the flanges 7 of the slider.

it is the purpose of the key-like portion 27 which cooperates with the slot 28 in the top wing to maintain the post-like member in either its locked or unlocked position thereby tending to prevent accidental turning of the post-like member relative to the wings and slider body.

As a result of my invention it will be seen that there is provided a simple and inexpensive lock construction for sliders for slide fasteners which effectively locks the outer ends thereof outwardly into said recess to lock the slider against movement and adapted to be moved to another position so as to permit free passage of the fastoner elements through said channel, and a pull member pivotally attached to the outer end of said post-like member on the outer side of one of the wing portions for actuating said post-like member and for manipulating said slider.

2. In a slider for slide fasteners, as defined in claim 1, including cam means carried by said pull member adjacent its attachment to said post-like member which cooperates with the outer side of the wing portion to move said post-like member to its retracted position when the pull member is disposed in substantially a position normal to said wings whereby the cam portion is moved out of engagement with the inner ends of the fastener elements so as to permit them to pass freely through said channel.

3. In a slider for slide fasteners, as defined in claim 1, including resilient means arranged on the inner end of said post-like member for maintaining the same normally in its locked position with the cam portion in engagement with the inner ends of said fastener elements.

4. In a slider for slide fasteners of the class described having a pair of spaced-apart wing portions connected at one end thereof by a neck portion and having inwardly extending marginal flange portions so as to provide substantially a Y-shaped channel between said wings into and through which the fastener elements pass, means for locking said slider against unintentional movement along said elements comprising a post-like member arranged in oppositely disposed apertures in said wings adjacent said neck portion and extending into and through said channel, said post-like member being mounted for reciprocable movement in a plane substantially normal to said wings and having an enlarged outer head portion extending through the aperture in one of the wing portions and a reduced inner end portion extending through the aperture in the other wing portion so as to provide an annular cam portion intermediate the length of said post-like member which is disposed in said channel,-said cam portion in one position adapted to engage the inner ends of said fastener elements so as to force them outwardly against said flange portions and adapted to be moved to another position so as to permit free passage of the fastener elements through said channel, a pull member pivotally attached to the enlarged head portion of said post-like member on the outer side of the wing portion for manipulating said slider and for actuating said post-like member, and a spring member arranged on the inner end of the reduced inner end portion of said post-like member which co-operates with the adjacent wing portion for maintaining said post-like member normally in its locked position with the annular cam portion in engagement with the inner ends of said fastener elements.

5. In a slider for slide fasteners, as defined in claim 4, including a recess arranged on the inner side of at least one of said flange portions adjacent the uper end thereof so as to form a shoulder which is adapted to engage the outer ends of said fastener elements when forced thereagainst by the cam portion of said post-like member.

6. In a slider for slide fasteners, as defined in claim 4, including cam means carried by said pull member adjacent its attachment to the enlarged head portion of said posed in a position substantially normal to said whereby the annular cam p rnent with the inner ends of said fastener elements.

References Cited in the file of this patent UNITED STATES PATENTS Norton Apr. 12, Marinsky Jan. 19, Marinsky Sept. 26, Bailey Sept. 10, Puc Jan. 13, Marinsky May 23, Grifiin Oct. 5, Schaaflf Sept. 18, Lawson Apr. 8,

operates with the outer side to move said post-like memwhen the pull member is diswing ortion is moved out of engage- 

